Dr. Jack Leong , MD
Pediatrics • Chicago, IL
3000 N Cicero Ave
Chicago, IL 606415106
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on November 21, 2005; this date does not establish years in practice.
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Published CMS data list 167 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 123 service units.
- 99213 — Established patient outpatient office visit: 44 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 998 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Simvastatin — 106 prescription fills, including refills.
- Lisinopril — 97 prescription fills, including refills.
- Metformin Hcl — 88 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 36 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Pediatrics in Chicago, IL (2024, 20 clinicians with data). Median for this group: 154. Middle half: 47 to 230.
Close to the middle for Medicare Part B services among clinicians listed under Pediatrics in Illinois (2024, 63 clinicians with data). Median for this group: 250. Middle half: 55 to 642.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 191 in 2020 to 167 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
3000 N Cicero Ave
Chicago, IL 606415106
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Exclusive Physicians - Illinois Pllc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1982
What Public CMS Data Show
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
43 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $19,820 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $12,738 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
2,550 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$113,625 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $474.21 across 10 records.
By nature of payment
- Food and Beverage: $474.21 across 10 records.
Reporting-company totals (3 largest of 6)
- MIMEDX Group, Inc.: $153.69 across 2 records.
- Medtronic, Inc.: $141.94 across 2 records.
- Eli Lilly and Company: $101.00 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
44 years (graduated 1982)
CMS Doctors and Clinicians data list 1982 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Leong has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Leong as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Pediatrics in Chicago, IL (2024, 20 clinicians with data). Median for this group: 154. Middle half: 47 to 230.
Close to the middle for clinicians listed under Pediatrics in Illinois (2024, 63 clinicians with data). Median for this group: 250. Middle half: 55 to 642.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Pediatrics in Chicago, IL (2024, 20 clinicians with data). Median for this group: $12,343. Middle half: $3,698 to $23,021.
Close to the middle for clinicians listed under Pediatrics in Illinois (2024, 63 clinicians with data). Median for this group: $22,128. Middle half: $4,721 to $56,777.
Paid by Medicare
Close to the middle for clinicians listed under Pediatrics in Chicago, IL (2024, 20 clinicians with data). Median for this group: $10,011. Middle half: $2,618 to $15,915.
Close to the middle for clinicians listed under Pediatrics in Illinois (2024, 63 clinicians with data). Median for this group: $14,969. Middle half: $3,713 to $42,033.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Pediatrics in Chicago, IL (2024, 25 clinicians with data). Median for this group: 78. Middle half: 31 to 259.
More Part D prescriptions than 65% of clinicians listed under Pediatrics in Illinois (2024, 92 clinicians with data). Median for this group: 187. Middle half: 26 to 2,892.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Pediatrics in Chicago, IL (2024, 25 clinicians with data). Median for this group: $4,125. Middle half: $450 to $33,981.
A higher Part D drug cost than 65% of clinicians listed under Pediatrics in Illinois (2024, 92 clinicians with data). Median for this group: $12,962. Middle half: $830 to $193,681.
1,143 active clinicians are listed under Pediatrics with a practice address in Chicago, IL (3,178 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
0.3% of these 1,143 clinicians have the CMS telehealth indicator.
4.6% of these 1,143 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 13% from 191 in 2020 to 167 in 2024.
- 2020: 191
- 2021: 176
- 2022: 198
- 2023: 180
- 2024: 167
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Medicare-allowed amount
Medicare-allowed amount increased 11% from $17,787 in 2020 to $19,820 in 2024.
- 2020: $17,787
- 2021: $18,966
- 2022: $20,243
- 2023: $21,539
- 2024: $19,820
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Paid by Medicare
Paid by Medicare increased 13% from $11,227 in 2020 to $12,738 in 2024.
- 2020: $11,227
- 2021: $12,795
- 2022: $12,837
- 2023: $13,719
- 2024: $12,738
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 88% from 532 in 2020 to 998 in 2024.
- 2020: 532
- 2021: 490
- 2022: 844
- 2023: 813
- 2024: 998
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30-day fills
30-day fills increased 88% from 1,355 in 2020 to 2,550 in 2024.
- 2020: 1,355
- 2021: 1,239
- 2022: 2,045
- 2023: 2,100
- 2024: 2,550
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Part D drug cost
Part D drug cost increased 415% from $22,065 in 2020 to $113,625 in 2024.
- 2020: $22,065
- 2021: $63,162
- 2022: $122,429
- 2023: $139,389
- 2024: $113,625
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $35.64 in 2021 to $474.21 in 2025.
- 2021: $35.64
- 2022: $508.39
- 2023: $200.50
- 2024: $728.10
- 2025: $474.21
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $474.21.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| MIMEDX Group, Inc. |
Food and Beverage
In-kind items and services
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— | General | $128.69 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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SIGNIA | General | $114.66 |
| Eli Lilly and Company |
Food and Beverage
Cash or cash equivalent
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ZEPBOUND | General | $101.00 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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SIGNIA | General | $27.28 |
| MIMEDX Group, Inc. |
Food and Beverage
In-kind items and services
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— | General | $25.00 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $18.73 |
| Kowa Pharmaceuticals America, Inc. |
Food and Beverage
In-kind items and services
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ZORYVE | General | $15.28 |
| Kowa Pharmaceuticals America, Inc. |
Food and Beverage
In-kind items and services
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ZORYVE | General | $15.25 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $14.47 |
| Kowa Pharmaceuticals America, Inc. |
Food and Beverage
In-kind items and services
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ZORYVE | General | $13.85 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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123 | 40 | $180.00 | $130.07 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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44 | 22 | $152.84 | $86.84 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Simvastatin | Simvastatin | 106 | 9,540 | $667.12 | 39 |
| Lisinopril | Lisinopril | 97 | 8,730 | $665.02 | 34 |
| Metformin Hcl | Metformin Hcl | 88 | 7,680 | $474.88 | 34 |
| Trulicity | Dulaglutide | 50 | 2,496 | $77,636.01 | 12 |
| Atorvastatin Calcium | Atorvastatin Calcium | 43 | 3,870 | $361.58 | 14 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 43 | 2,418 | $1,170.48 | 19 |
| Basaglar Kwikpen U-100 | Insulin Glargine,hum.Rec.Anlog | 41 | 1,485 | $16,485.65 | — |
| Famotidine | Famotidine | 35 | 3,090 | $187.06 | 14 |
| Ramipril | Ramipril | 34 | 3,060 | $271.49 | 11 |
| Amlodipine Besylate | Amlodipine Besylate | 31 | 2,790 | $230.68 | 14 |
| Montelukast Sodium | Montelukast Sodium | 27 | 2,430 | $392.46 | 12 |
| Losartan Potassium | Losartan Potassium | 23 | 1,880 | $126.56 | — |
| Escitalopram Oxalate | Escitalopram Oxalate | 22 | 1,980 | $328.53 | — |
| Pioglitazone Hcl | Pioglitazone Hcl | 21 | 1,890 | $315.47 | — |
| Arexvy | Rsvpref3 Antigen/As01e/Pf | 21 | 456 | $6,756.69 | 20 |
| Meloxicam | Meloxicam | 20 | 1,080 | $22.93 | — |
| Levothyroxine Sodium | Levothyroxine Sodium | 20 | 1,800 | $262.25 | — |
| Metoprolol Succinate | Metoprolol Succinate | 20 | 1,740 | $178.32 | — |
| Prednisone | Prednisone | 19 | 95 | $57.37 | — |
| Carvedilol | Carvedilol | 19 | 1,290 | $144.97 | — |
| Citalopram Hbr | Citalopram Hydrobromide | 19 | 1,590 | $93.54 | — |
| Omeprazole | Omeprazole | 17 | 1,454 | $236.23 | — |
| Alprazolam | Alprazolam | 16 | 840 | $74.89 | — |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 15 | 782 | $2,003.18 | — |
| Clonazepam | Clonazepam | 14 | 420 | $50.47 | — |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-10-20NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PEDIATRIC MEDICINE
I20090401000309
IL
2062416381
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Exclusive Physicians - Illinois Pllc
3000 N Cicero Ave, Chicago, IL 606415106
Phone: 2483364000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Career & Practice History
NPI enumerated November 21, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Pediatrics Specialists in Chicago
- Dr. Michael Sethi, MD
- Dr. Suwon Nopachai, MD
- Dr. Nela Cordero, MD
- Dr. Saul Weiner, MD
- Dr. Min Jie Lee, MD
- Dr. Sara Smith, MD
Mailing Address
3000 N Cicero Ave
Chicago, IL 606415106
Phone: 7732823115